A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3253800 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 17 20 22 24 25 29 30 33 34 40 44 50 51 55 58 60 66 68 75 85 87 88 100 102 110 116 120 132 136 145 150 165 170 174 187 200 204 220 232 255 264 275 290 300 319 330 340 348 374 408 425 435 440 493 510 550 561 580 600 638 660 680 696 725 748 825 850 870 935 957 986 1,020 1,100 1,122 1,160 1,275 1,276 1,320 1,450 1,479 1,496 1,595 1,650 1,700 1,740 1,870 1,914 1,972 2,040 2,175 2,200 2,244 2,465 2,550 2,552 2,805 2,900 2,958 3,190 3,300 3,400 3,480 3,740 3,828 3,944 4,350 4,488 4,675 4,785 4,930 5,100 5,423 5,610 5,800 5,916 6,380 6,600 7,395 7,480 7,656 7,975 8,700 9,350 9,570 9,860 10,200 10,846 11,220 11,832 12,325 12,760 14,025 14,790 15,950 16,269 17,400 18,700 19,140 19,720 21,692 22,440 23,925 24,650 27,115 28,050 29,580 31,900 32,538 36,975 37,400 38,280 43,384 47,850 49,300 54,230 56,100 59,160 63,800 65,076 73,950 81,345 95,700 98,600 108,460 112,200 130,152 135,575 147,900 162,690 191,400 216,920 271,150 295,800 325,380 406,725 542,300 650,760 813,450 1,084,600 1,626,900 and 3,253,800, with no remainder.
Since 3,253,800 cannot be divided by just 1 and 3,253,800, it is not a prime number.